The stylish twosome weren't the only A-listers kicking off summer at Silver's bash. In addition to the men in the Cruise family (Tom Cruise and his son Connor, 15), Silver's fete was attended by Courteney Cox and estranged hubby David Arquette with daughter Coco, 6; Gwen Stefani and Gavin Rossdale with sons Kingston and Zuma; Barbara Streisand, Sylvester Stallone, Robert Downey Jr, and director Guy Richie, among others.